| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417218000 |
Adjustable cam or linkage
| 104 |
| 417213000 |
Having condition responsive pumped fluid control
| 34 |
| 417223000 |
Disconnectable drive element (e.g., clutch, belt, shifter, etc.)
| 16 |
| 417214000 |
Having means to hold or resist movement of pumping element | 5 |
| 20090214359 | LIQUID PUMP FOR AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR HEATING LIQUID - A liquid pump for an internal combustion engine having a housing in which a pump rotational shaft is accommodated, in particular a water pump of a heat exchanger circuit of a vehicle, and an eddy current arrangement is provided at least partially inside the housing of the liquid pump. The invention furthermore relates to a device for heating a liquid. | 08-27-2009 |
| 20100322788 | AUXILIARY BRAKING DEVICE FOR WELLHEAD HAVING PROGRESSIVE CAVITY PUMP - An auxiliary braking device can be used for wellhead applications having a progressive cavity pump. A housing of the device independently mounts on the pump's existing drive using a mounting member, and an adapter on the housing connects to a rotatable drive shaft of the pump. A hydraulic motor on the housing has a motor shaft mechanically coupled to the adapter by a plurality of gears or the like. A control valve couples to the hydraulic motor and operates to control communication of hydraulic fluid through the hydraulic motor, thereby controlling rotation of the rotatable shaft. A controller and electric sensors can operated the control valve in response to the sensed rotation of the shaft. Alternatively, mechanical mechanisms can operate the control valve in response to the rotation of the drive shaft. | 12-23-2010 |
| 20110150670 | TRANSMISSION PUMP WITH ONE-WAY CLUTCH FUNCTION AND METHOD OF ASSEMBLING PUMP HUB FOR A TORQUE CONVERTER TO A TRANSMISSION PUMP - A pump for a transmission, including: a housing with a pneumatic port; and a gear for engaging with a pump hub for a torque converter, wherein the pneumatic port is for introducing compressed air into the housing to restrict rotation of the gear. In an example embodiment, restricting rotation of the gear is to prevent rotation of the gear when the gear is interfaced with the pump hub to rotationally lock the gear with the pump hub. A pump for a transmission, including: a housing; a gear for engaging with a pump hub for a torque converter; and, an element for enabling rotation of the gear in a first rotational direction and locking the gear with respect to rotation in a second rotational direction, opposite the first rotational direction. In an example embodiment the element includes a one-way clutch. | 06-23-2011 |
| 20140334947 | FLUID PUMP SYSTEM - A fluid pump system for a fluid delivery system is disclosed. The fluid pump system includes a drive cylinder and a drive piston slidably disposed in the drive cylinder. A drive rod including a crowned end is connected to the drive piston. The fluid system further includes a pump cylinder and a pump piston slidably disposed in the pump cylinder. A pump rod including a crowned end is connected to the pump piston. The drive rod and the pump rod are configured to be detachably coupled to each other, wherein the crowned end of the drive rod cooperates with the crowned end of the pump rod. | 11-13-2014 |
| 20150044066 | VARIABLE CAPACITY RECIPROCATING COMPRESSOR - A reciprocating compressor may include a shell, a first cylinder, a plate, a second cylinder, and a piston. The first cylinder may be disposed within the shell and may include a first valve. The plate may be fixed relative to the first cylinder and may include a second valve. The second cylinder may be axially aligned with the first cylinder and may be moveable relative to the first cylinder between first and second positions. The piston may be disposed within the second cylinder and may include a third valve. The piston may reciprocate relative to the first and second cylinders. The piston and the plate may define a first compression chamber therebetween. The piston and the first cylinder may define a second compression chamber therebetween. | 02-12-2015 |
| 417216000 |
Plural pumps with individual or relative control | 3 |
| 20080247882 | Split-Pressure Dual Pump Hydraulic Fluid Supply System for a Multi-Speed Transmission and Method - A split-pressure, dual-pump system for supplying hydraulic fluid to a multi-speed transmission is provided. The system includes a low-pressure work circuit operatively connected to a fixed displacement pump, and a high-pressure work circuit operatively connected to a variable displacement pump. The system also includes a regulator valve fluidly coupled to the variable displacement pump via a decrease circuit and an overage circuit for regulating the flow of fluid to the high-pressure work circuit. The invention consists of separating the high-pressure needs of the system into a separate work circuit from the low-pressure needs of the system, and optimizing pump design separately for each work circuit to maximize transmission efficiency and reduce parasitic losses. A method of supplying hydraulic fluid to a multi-speed transmission at variable flow and pressure is also provided. | 10-09-2008 |
| 20130129529 | PRECISION PUMP WITH MULTIPLE HEADS - A pump for one or more different process fluids is provided including a pumping chamber having a process fluid inlet and outlet coupled to a process fluid valve on each pumping chamber for selectively preventing and allowing flow of process fluid through the pumping chamber. An actuation mechanism for pumping actuating fluid to actuating fluid chambers is provided that is in communication with the actuating fluid chambers to permit flow into each actuating fluid chamber of incompressible actuating fluid. A diaphragm separates each pumping chamber from an associated actuating fluid chamber for separating process fluid from actuating fluid. The actuation mechanism is removable by a quick disconnect that provides for disconnection of the activation mechanism without affecting process fluid. Operation of the actuation mechanism to displace actuating fluid causes actuating fluid to flow only into each actuating fluid chamber having an opened process fluid valve, resulting in pumping. | 05-23-2013 |
| 20140301870 | FLUID EJECTION DEVICE AND MEDICAL DEVICE - A fluid ejection device includes a pulse generation unit that changes the volume of a fluid chamber using a volume changing section to eject pulsating flow; a fluid supply unit including a pump chamber and a pump chamber volume changing section that changes the volume of the pump chamber to supply the fluid to the pulse generation unit; a drive control unit that inputs a pulsating flow drive signal for driving the pump chamber volume changing section and inputs a fluid supply drive signal for driving the fluid supply unit; and an operation command input unit that inputs an operation command to the drive control unit, wherein the fluid supply drive signal and the pulsating flow drive signal are input in conjunction with the input of the operation command. | 10-09-2014 |
| 417217000 |
Reversible flow pump | 2 |
| 20090155093 | HYDRAULIC DEVICE WITH A LUBRICATING PUMP - The invention relates to a hydraulic device with a supply line for pressurized hydraulic fluid and with a lubricating pump that is connected to the supply line in a fluidic fashion. The lubricating pump comprises a hydraulic inlet, a pump element for conveying a lubricant from a reservoir to at least one lubricating point of the hydraulic device, and mechanism for producing a pump stroke of the pump element. The mechanism for producing a pump stroke comprises a base body, a piston unit movable in the base body, and a reversing mechanism for reversing the direction of movement of at least one element of the piston unit. The reversing mechanism comprises at least one bypass formed by at least one recess, and at least one elastic element acting upon the piston unit in a first direction oriented toward the hydraulic inlet whereby the piston unit can be displaced in the base body in an oscillating fashion between a closed position in which a fluid connection between the hydraulic inlet and the hydraulic outlet is blocked, and an open position in which said fluid connection is unblocked in order to produce a pump stroke of the pump element. | 06-18-2009 |
| 20160025081 | HYDRAULIC PUMP WITH DOUBLE DIRECTION OF ROTATION - A hydraulic pump with two rotation directions has axial pistons bearing against a swashplate, the pump with a head having two chambers to be connected to a high-pressure circuit and to a low-pressure circuit. A port plate in the form of a flat plate is arranged between a rotary barrel and the head and has two identical ports passing through the thickness of the flat plate. The port plate pivots about an axis to be able to occupy two angular positions according to the direction of rotation of the pump. The pump has a hydraulic-control device for controlling the angular position of the port plate and is able automatically to bring about a change in angular position of the port plate when the direction of rotation of the pump is reversed, under the effect of a pressure differential between the two chambers of the head. | 01-28-2016 |
| 417215000 |
By changing phasing of plural pistons in single chamber | 1 |
| 20130309103 | ACTUATOR SYSTEM FOR A CONTROLLED COOLANT PUMP - A coolant pump of an internal combustion engine, with a pump housing and a hollow shaft rotatably mounted therein. Coolant is delivered via an impeller wheel from a suction connection. The flow is controlled by a guide plate on the impeller wheel that is variably displaceable axially between two end positions. The guide plate is adjustable by a push rod actuator guided in the pump shaft. The actuator has a radial piston pump integrated within the coolant pump with an intake piston and a counterpiston guided in the pump shaft, that are inserted lying opposite one another and delimit a pressure space. The pistons are enclosed outside by a linearly displaceable control element guided in the pump housing. Adjustment of the control element takes place as a function of a rotary angle of the pump shaft via an actuator unit having an electrically operated actuating element and a linear freewheel. | 11-21-2013 |
| Entries |
| Document | Title | Date |
|---|
| 20080206069 | Method for Prevention/Detection of Mechanical Overload in a Reciprocating Gas Compressor - Mechanical overloads in a reciprocating gas compressor can cause irreparable damage to compressor components if the source of the overloads is not repaired. A method of detecting mechanical overloads includes applying an overload indicator across an interface between components in the compressor, and observing a mechanical condition of the overload indicator. The mechanical condition of the overload indicator is indicative of whether the compressor experienced a mechanical overload. By placing the indicator in an appropriate location in the compressor, overload conditions can be checked during routine inspections and maintenance checks. | 08-28-2008 |
| 20080260545 | Variable Capacity Oil Pump - The invention relates to a wind turbine being provided with a fluid displacement means for ensuring a certain increased pumping capacity at a certain reduced rotational speed of the main shaft of the rotor and thus of a drive shaft from a gear box of the wind turbine. The invention also relates to a wind turbine being provided with fluid displacement means for ensuring a certain increased pumping capacity at a certain increased rotational speed of the main shaft of the rotor and thus of a drive shaft from a gear box of the wind turbine. The means may be mechanical, hydraulic, pneumatic or electrical. Additionally, the invention relates to a method for operating a wind turbine being provided with such fluid displacement means. | 10-23-2008 |
| 20090060755 | MICROPUMP - A micropump that includes: a tube frame including an elastic tube, and a tube guide groove for attachment of the tube in the form of an arc; a cam drive wheel whose rotation center is the same as an arc center of the tube guide groove, and moves in response to a motor that can be rotated in forward and reverse directions; a first cam that is axially fixed to a center axis of the cam drive wheel, and is provided with a finger depression section at a circumferential portion thereof; a second cam that is pivotally supported by the center axis of the cam drive wheel to be able to rotate, and is provided with a finger depression section at a circumferential portion thereof; and a plurality of fingers provided between the tube and the respective finger depression sections of the first and second cams radially from the rotation center. The micropump can be in a first state of continuously feeding a fluid by, when the first cam is rotated in the forward direction, the first cam pushing and rotating the second cam in the same direction, by the finger depression sections of the first and second cams respectively depressing the fingers one by one, and by the fingers sequentially closing and opening the tube repeatedly from a fluid inflow side to a fluid outflow side, a second state of rotating only the first cam in the reverse direction at a time of, in the first state, a detection of a position where the finger depression section of the second cam releases the tube from depression by the fingers, and a third state of stopping the first cam from rotating at a time of, in the second state, a detection of a position where the first cam releases the tube from depression by the fingers. The first state is retained by a drive command coming from the micropump being in the third state. | 03-05-2009 |
| 20090196767 | SERVICE PACK VARIABLE DISPLACEMENT PUMP - A service pack, in certain embodiments, includes an engine, a variable displacement pump coupled to the engine, and a controller configured to control displacement of the variable displacement pump in response to a load condition associated with the engine. A method of managing power of an engine-driven system, in certain embodiments, includes sensing a load associated with an engine coupled to a variable displacement pump. The method also includes adjusting pump displacement of the variable displacement pump in response to the sensed load and one or more limits associated with the engine. | 08-06-2009 |
| 20090232666 | Linear Compressor - The present invention discloses a linear compressor in which a piston is driven by a linear motor and linearly reciprocated inside a cylinder to suck, compress and discharge refrigerants. Even though load is varied, the linear compressor performs the operation in a resonance state by estimating a natural frequency of the piston and synchronizing an operation frequency of the linear motor with the natural frequency of the piston, and efficiently handles the load by varying a compression capacity by changing a stroke of the piston. | 09-17-2009 |
| 20090252620 | Reinforced smart mud pump - A pump system for movement of fluids having a reciprocating piston power pump having at least three reciprocating pistons operable to displace fluid from a housing having a pumping chamber, an integrally forged crankshaft operably connected to the pistons, at least one sensor operable to sense ambient conditions on the pump, and a computer control for processing data from the sensor to regulate the operation of the pump in response to the data. The system also utilizes protective infused treatments for lubricity and enhanced lubrication sprayers and a reset relief valve and pressure sensors operably connected to the computer system for control and monitoring of the pump. | 10-08-2009 |
| 20090269213 | Method of controlling a hydraulic system - A method of controlling a hydraulic system having a variable displacement pump operatively coupled to an engine. The method includes detecting a speed of the engine, and determining a desired power value of the pump. The method also includes identifying an allowable power value that may be expended by the pump at the detected speed. The method also includes selecting a pump power value. The selected pump power value is the lower of the allowable power value and the desired power value. The method further includes adjusting the pump to deliver the selected pump power value. | 10-29-2009 |
| 20090269214 | Hydrostatic Pump With A Mechanical Displacement Volume Control - A hydrostatic pump ( | 10-29-2009 |
| 20090269215 | "Hydrostatic Pump" - A hydrostatic pump ( | 10-29-2009 |
| 20090304528 | Electrical Signal Input Type Displacement Control Device and Hydraulic Equipment - An electrical signal input type displacement control device capable of reducing pipes on hydraulic equipment, and hydraulic equipment including the same. The pump equipment includes two the pump units. Electrical regulators are disposed for the pump units. In each of the electrical regulators, a solenoid proportional valve changes a supply status of driving oil. A pilot piston activates a servo switching valve in accordance with a supply status of the supplied driving oil, and controls a supply status of mechanism driving oil supplied to a servo mechanism. Servo mechanisms change the capacities of the pump units in accordance with the supply status. In the electrical regulators, a driving oil passage connects the input port to an inter-pump passage. | 12-10-2009 |
| 20100028167 | INTERNAL COMBUSTION ENGINE AND METHOD OF CONTROLLING THE SAME - Immediately after startup of the engine, secondary air is supplied by an air pump into each exhaust branch passage via a secondary-air supply passage. A pressure sensor is disposed in the secondary-air supply passage. An output voltage of the pressure sensor decreases as the battery voltage decreases. When the battery voltage is lower than a permissible voltage, the output value of the pressure sensor is inhibited from being used as an output value representing the pressure. Thus, atmospheric pressure can be accurately detected. | 02-04-2010 |
| 20100040484 | VARIABLE VOLUME CLEARANCE POCKET FOR A RECIPROCATING COMPRESSOR CYLINDER - A controllable variable volume clearance pocket for reciprocating compressor cylinders is disclosed. The invention includes a device for varying the clearance volume of a variable volume clearance pocket in a controlled manner. The device can be used repeatedly to change the compressor cylinder clearance volume as required to control compressor capacity and power required from the compressor driver. The device is typically mounted on the outer or head end of a reciprocating compressor cylinder, but can also be scaled and configured for use either in conjunction with a variable clearance volume unloader operating over a reciprocating compressor valve pocket or a special port in a reciprocating compressor body. | 02-18-2010 |
| 20100047083 | HIGH PRESSURE PUMP OF VARIABLE DISPLACEMENT - A variable-volume pump comprises one or more reciprocating pistons within respective reciprocating cylinders. The phase relationship between the reciprocating piston(s) and the reciprocating cylinder(s) determines the volumetric output of the pump. | 02-25-2010 |
| 20100092311 | DISPLACEMENT CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR - The present invention provides a displacement control valve for a variable displacement compressor, the displacement control valve including a valve housing, in which a discharge chamber passage and a crank chamber passage are provided, and a valve body for opening and closing the valve, characterized in that a motor rotates the valve body to open and close the valve. Therefore, the present invention can reduce the overall length of the displacement control valve to reduce the size of the compressor, thereby achieving a compact structure of the compressor. | 04-15-2010 |
| 20100183450 | STROKE-REGULATED LINEAR COMPRESSOR - A linear compressor having an electromagnet; an oscillating body movably guided in an oscillating fashion in the alternating field of the electromagnet; a cylinder; a piston connected to the oscillating body and movable back and forth inside the cylinder; a power supply circuit to supply the electromagnet with an alternating current; a proximity sensor to detect whether a distance between the piston and the end face of the cylinder falls below a predetermined threshold value; and a control circuit to detect a time period in which the distance between the piston and the end face of the cylinder falls below the threshold value and to regulate an amplitude and/or a phase of the alternating current if the time period deviates from a positive setpoint value. | 07-22-2010 |
| 20100209260 | DEVICE FOR ADJUSTING THE STROKE VOLUME OF HYDRAULIC PISTON MACHINES - A device for adjusting the swept volume of a first piston machine ( | 08-19-2010 |
| 20100303642 | CONTROLLER AND WORK MACHINE PROVIDED THEREWITH - A controller includes: a storage unit that stores a map in which an operation amount and an upper limit value of suction horsepower of a hydraulic pump are associated with each other, for each operation content identified by a cylinder that is an operation object out of the cylinders, and by a direction of operation performed on this cylinder; an operation horsepower determination unit that determines the upper limit value of suction horsepower for each cylinder by using the map stored in the storage unit when an actuation command relating to at least one cylinder is input by an operation lever; a high-level selection unit that selects the maximum upper limit value of suction horsepower out of the upper limit values of suction horsepower determined by the operation horsepower determination unit; and a regulator that regulates a displacement of the hydraulic pump so as to obtain horsepower equal to or lower than the suction horsepower selected by the high-level selection unit. | 12-02-2010 |
| 20100310386 | HYDRAULIC DAMPING ASSEMBLY AND REGULATING SYSTEM - For both adjustable flow restrictors D | 12-09-2010 |
| 20120034107 | ROTARY VACUUM PUMP WITH A DEVICE FOR DECOUPLING THE DRIVING MOTOR - A rotary vacuum pump comprises, between the rotor ( | 02-09-2012 |
| 20120082570 | DUAL DRIVE PUMP SYSTEM - A dual drive pump system for rear wheel or front wheel drive automatic transmission in a motor vehicle includes a dual drive pump disposed off-axis of the transmission input shaft axis and driven by a gear train driven by a hub. The dual drive pump is also driven by a gear train driven by an auxiliary motor. Torque multiplication through the gear train allows the dual drive pump to have a smaller displacement while still providing the hydraulic pressure needs of the transmission. The dual drive pump may be driven by either an engine or the auxiliary motor depending on the operating conditions of the motor vehicle. | 04-05-2012 |
| 20120275933 | HYDRAULIC APPARATUS RETURN TO NEUTRAL MECHANISM - A hydraulic apparatus is provided with a return to neutral mechanism for returning a trunnion control bracket arm to a neutral position. The return to neutral mechanism comprises a pair of springs, one spring connecting a fixed bracket to a first rotatable bracket and the other spring connecting the fixed bracket to a second rotatable bracket. The mechanism uses springs with different spring constants and the springs are attached to the brackets in a single plane. | 11-01-2012 |
| 20130058801 | HYBRID COMPRESSOR FOR AN AIR-CONDITIONING CIRCUIT - The invention relates to a hybrid compressor ( | 03-07-2013 |
| 20130136624 | CONTROL APPARATUS OF WORKING VEHICLE AND CONTROL METHOD THEREOF - A control apparatus of a working vehicle including a hydraulic pump driven by an engine and two hydraulic motors connected in parallel to the hydraulic pump, a clutch being released or engaged so that a power is transmitted to one of the hydraulic motors via the clutch, includes: a load detection unit determining a load of the working vehicle from a throttle output amount and an engine speed of the engine; and a control unit reducing a pump injection amount of the hydraulic pump under an upper limit injection amount of the hydraulic pump predetermined based on the load at a time of release shift control of the clutch and increasing a pump injection amount of the hydraulic pump under a lower limit injection amount of the hydraulic pump predetermined based on the load at a time of engagement shift control of the clutch. | 05-30-2013 |
| 20130156612 | OIL INJECTION DEVICE FOR VARIABLE-SPEED SCROLL REFRIGERATION COMPRESSOR - The oil injection device according to the invention includes an oil pump designed to be rotationally coupled to the electric motor of a compressor and including inlet and outlet ports, an oil injection duct connected to the first outlet port and designed to supply a compression stage of the compressor with oil, and an oil return duct connected to the first outlet port and designed to return the oil into an oil sump of the compressor. The pressure losses in the oil injection duct are primarily singular pressure losses proportional to the square of the oil flow rate passing through the oil injection duct. The pressure losses in the oil return duct are primarily pressure losses due to friction proportional to the oil flow rate passing through the oil return duct. | 06-20-2013 |
| 20130183169 | PROPULSION AND MOTION-TRANSMISSION ASSEMBLY, IN PARTICULAR FOR A ROTARY-WING AIRCRAFT - A propulsion and motion-transmission assembly ( | 07-18-2013 |
| 20130189125 | Compressed-air compressor - A compressed-air compressor, the compressor having a cylinder; a piston mounted to slide along the cylinder and define, inside the cylinder, a variable-volume compression chamber; and an actuator assembly connected to the piston to impart to the piston a reciprocating travel, along the cylinder, between a top dead centre position and a bottom dead centre position; the actuator assembly having a belt drive; and the cylinder having a vent hole formed, at most, at | 07-25-2013 |
| 20130209283 | Hydraulic Working Machine - An exhaust gas temperature raising processing system, which increases a load acting on an engine to raise the exhaust gas temperature, includes an electric assist motor connected to the engine and an inverter for adjusting a torque of the electric assist motor. It also includes a main controller having a first determination unit for determining whether or not an actuator control valve is in a non-feed state and a second determination unit for determining whether or not clogging has occurred on a filter of an exhaust gas purification system. When the non-feed state is determined by the first determination unit and clogging is determined to have occurred on the filter by the second determination unit, the main controller drives the electric assist motor to generate electric power such that a load acting on the engine is increased. | 08-15-2013 |
| 20130216402 | WATER PUMP - A water pump includes a base, a cam, a joint, and a piston. The base includes a PTO-attachment portion, a cam-attachment portion, a first contact surface, and a second contact surface. The cam includes a central opening, a first cam contact surface, and a second cam contact surface, wherein the cam-attachment portion of the base extends into the central opening. The joint pivotally couples the cam to the cam-attachment portion of the base. In a first operating position of the cam, the first contact surface engages the first cam contact surface so that the cam is positioned at a first angle relative to the axis of PTO rotation. In a second operating position of the cam, the second contact surface engages the second cam contact surface so that the cam is positioned at a second angle, greater than the first angle, relative to the axis of PTO rotation. | 08-22-2013 |
| 20130243616 | LIQUID CIRCULATING DEVICE AND MEDICAL APPARATUS - A liquid circulating device includes a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; a liquid resistance element; an outlet channel; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit. When the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies a predetermined relationship. | 09-19-2013 |
| 20140205471 | DETERMINING TOP-DEAD-CENTER (TDC) OF RECIPROCATING COMPRESSOR - Various embodiments include approaches for determining a top-dead-center (TDC) of a reciprocating compressor. In some cases, an apparatus includes: a pressure transducer configured to measure pressure fluctuations inside a compressor cylinder and convert the pressure fluctuations into an asynchronous waveform; and at least one computing device operably connected with the pressure transducer, the at least one computing device configured to: extract a data set representing piston angles over a single revolution of a piston within the compressor cylinder from the asynchronous waveform; remove data representing invalid piston angles from the data set to form a refined data set; determine an average piston angle for the single revolution from the refined data set; and adjust the refined data set to identify a top-dead-center (TDC) position of the piston within the compressor cylinder. | 07-24-2014 |
| 20140219830 | COMPRESSORS FOR NATURAL GAS AND RELATED DEVICES, SYSTEMS, AND METHODS - A natural gas compressor can include a pre-staging chamber that couples with a supply line to receive natural gas from the supply line. The compressor can additionally include a first-stage chamber that couples with the supply line to receive natural gas from the supply line. The first-stage chamber can additionally be coupled with the pre-staging chamber to receive from the pre-staging chamber natural gas that has been compressed by the pre-staging chamber. The compressor can also include a second-stage chamber configured to receive natural gas that has been compressed by the first-stage chamber. | 08-07-2014 |
| 20140334946 | LEAKAGE DETECTION SYSTEM AND METHOD FOR FUEL TANK SYSTEMS - A method for detecting a leakage in a fuel tank system includes setting a first reference pressure value and generating an initial pressure in the fuel tank system, as well as determining a pressure difference between the pressure in the fuel tank system and the first reference pressure. The method also includes determining a linearity metric by comparing the determined pressure difference to at least one out of a linear and a non-linear data model, the linearity metric quantifying the non-linearity of said pressure difference as a function of time, and detecting a leakage in the fuel tank system based on the linearity metric, where a non-linear pressure difference function of time is indicative of a leakage in the fuel tank system. | 11-13-2014 |
| 20150125316 | FLUID CONVEYING DEVICE AND DRIVING METHOD FOR FLUID CONVEYING DEVICE - A fluid conveying device includes: a tube; a cam having protrusions; fingers arranged along the tube between the tube and the cam; a driving rotor which rotates the cam to sequentially push the fingers by the protrusions in a flowing direction of a fluid, repeatedly pressuring and opening of the tube, driving the cam; a detection unit which detects a rotating position of the cam; a control unit which calculates a cam rotation angle along a cumulative ejection volume, using a first approximation formula for an ejection area H where the cumulative ejection volume increases substantially in proportion to the rotation angle of the cam and a second approximation formula for a constant area J where the cumulative ejection volume little increases or decreases even if the cam rotates, driving the driving rotor until a rotating position of the cam corresponding to a designated cumulative ejection volume is reached. | 05-07-2015 |
| 20150316040 | Stress Reduction in Hydrostatic Cradle Bearing - In a piston pump assembly, cradle bearings support a swash plate on an inner surface of a housing assembly. The cradle bearing and/or the corresponding portion of the housing inner surface may have undercut portions allowing deflection of an inward portion of the cradle bearing when the swash plate is subjected to pressure forces from hydraulic fluid compressed within pump cylinders by the pump pistons. Deflection of the cradle bearings allows increased contact pressure to be further distributed across the engaging surfaces of the swash plates and the cradle bearings. | 11-05-2015 |
| 20160131119 | PUMP DEVICE - A pump device ( | 05-12-2016 |
| 20160131130 | Power Unit of Hydraulic Pumping Unit and Corresponding Hydraulic Pumping Unit - Disclosed is a power unit of a hydraulic pumping unit, which comprises a motor; a pumping rod driving device for driving reciprocating movement of a pumping rod; a variable pump driven by the motor, the variable pump hydraulically connected to the pumping rod driving device; a secondary hydraulic control unit hydraulically connected to the pumping rod driving device; an energy accumulator being in transmission connection with the secondary hydraulic control unit; a sensor for setting a stroke of the pumping rod; a first control device adapted to, based on the signals from the sensor, set the discharge capacity of the variable pump to be zero during the declining process of the pumping rod and to be positive during the ascending process of the pumping rod to drive the pumping rod driving device; and a second control device adapted to based on the signals from the sensor, set the secondary hydraulic control unit to function as a motor for driving the energy accumulator to accumulate energy during the descending process of the pumping rod, and to be driven by the energy accumulator to function as a pump for driving the pumping rod driving device during the ascending process of the pumping rod. The present invention further discloses a corresponding hydraulic pumping unit. The hydraulic pumping unit has high energy recycling utilization efficiency and is simple and reliable. | 05-12-2016 |
| 20160160851 | TWO-CYLINDER THICK MATTER PUMP HAVING A TRANSFER TUBE - A thick matter pump having a material feeding container arranged in which is a pivotable transfer tube. The transfer tube has a pivoting tube that is connected to a delivery line. In order to ensure reliable sealing of the coupling joint between the transfer tube and the container wall, the transfer tube has a metallic ring element which has an inlet in the form of an arcuate slot. A cushion is arranged between the ring element and the pivoting tube. The cushion has an aperture which encloses the slot. The ring element can be moved axially relative to the pivoting tube so that the ring element can be pressed against the inner surface of the container wall via the cushion element under the action of the delivery pressure in the transfer tube. | 06-09-2016 |
